Under control and follows a normal distribution

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A process is under control and follows a normal distribution with mean 100 and standard deviation 10. In constructing a standard -chart for this process, the control limits are set 3 standard deviations from the mean-i.e., 100 . The probability of observing an i outside the control limits is (.00135 + ,00135) = .0027. Suppose it is desired to construct a control chart that signals the presence of a potential special cause of variation for less extreme values of . How many standard deviations from the mean should the control limits be set such that the probability of the chart falsely indicating the presence of a special cause of variation is .10 rather than .0027?

Reference no: EM131111131

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